Standardize readme

README.md

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+This is the readme for the code associated with the paper
+
+Vogels TP, Sprekeler H, Zenke F, Clopath C, Gerstner W (2011)  
+Inhibitory plasticity balances excitation and inhibition in sensory  
+pathways and memory networks. *Science* 334:1569-73
+
+This matlab code was included in the supplementary online material at  
+the Science journal website. To run start matlab and cd to the folder  
+extracted from this archive. Type "inhib_plasticity" in the matlab  
+command line and you should see the figure generating from the  
+supplementary pdf:
+
+This archive also includes the authors matlab code (InputCurrents.m)  
+that makes the inputs separately as well as a Brian file  
+(isp_brian.py) (for Brian 1.3.0, not working with earlier versions)  
+(and a screenshot of the figure it produces) that runs the network  
+simulation:
+
+---
+
+20120307 line 71 in inhib_plasticity.m had round() added to it - T Vogels.
+
+20250620 Converted README to Markdown.